20 Most Recent
1999 Isuzu Trooper Questions & Answers

you can get guide from many sites.. i know few
like reliable-store
error codes/ fault codes, wiring diagrams, schematic diagrams, torque specs, engine info, switches functioning, assemble, disassembly, complete refurbish, repair, installation every single thing is covered
within seconds u can get the access and it's totally illustrative complete

If you have no oil pressure on the dash gauge you need to drop the tin sump under the engine and check the two oil pick up pipes in there . They crack and fall off or the seal goes hard letting in air so no oil pumps. An known fault on the 3.0
The long one is for the engine oil lube ( turbo ) and the short one is for the injection system .
The high pressure pump is only for the injectors.
If you have good oil pressure on the dash gauge then I agree with Guru Ronaldbrains the turbos are poor but ! its 5/30 oil in 3.0 4JX1 engine or you will have starting troubles .

on top of the thermastat housing there will be a temp sender at the top side of it or grub screw to undo. and top radiator up while bleed point is open wait for the air to dissaper and coolant stream free from bubbles . hope that is of some help

before you remove belt time mark on cam gear as well as crankshaft pulley, the timming mark on the pump drive gear (lower gear in this picture) will not line up but thats ok line up the mark on pulley to rear cover at about 12 O clock when the belt is off.

no response soso less1:will it slip parked, idling, in drive,footon brake,? then advance throttle and see like 2000rpm but fails and goes why higher?that is the stall test failing,2:fail in reverse, parked?

I had the trooper in for an oil change and emmissions check. Next day, it almost stalled. After a couple trips, it started to stall every time it stopped and I tried to start up again.

Turned out, the tubing coming out of the MAF has a hose clamp around it. That hose clamp could freely spin around. I tightened it up. The truck started running better. And after 3-4 trips, the codes cleared themselves.

Reading about it, there are a lot more causes, but this was apparently mine. IDK why it was loose. Something at the inspection place. Maybe they did it on purpose because they wanted nearly $80 to replace the fuel filter (a $10 part) and I refused.

the sender can be tested on car, or tank of floor or sender in hand
using any $10 DMM meter ever sold (ohms)
the service manual shows how, if They can read, RTM
all books sold on all cars tell this,
the dash meter too is tested in a very simple way, ask/